XPS-Study of Metal-Polymer Interfaces After Polymer Surface Treatment by Ion and Plasma Techniques
A study of the effects of surface treatment of polypropylene on the deposition of thin metal films is presented. The polypropylene samples were treated in a low-pressure air plasma in one case and sputtered by argon ions in the other case. XPS was used to detect compositional surface modifications. Plasma treatment leads to surface oxidation, whereas the sputtering results in oxygen-free surfaces for in-situ analysis. After surface treatment, thin films of Mg, Ca and Ce were deposited. Depending on the surface treatment, we find indications for different bonding mechanisms and very different sticking probabilities. For the case of oxidized surfaces, the formation of a metal-oxygen-polymer complex is anticipated, whereas for oxygen-free surfaces a metal-carbon bond is likely to be formed.
KeywordsSurface Treatment Plasma Treatment Polymer Surface Copper Foil Bonding Mechanism
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